The best analogy of MS I have read in a long time comes from an interview with the graphic artist Johnny Hicklenton. Johnny is the subject of an award winning film "Here's Johnny" which follows his life and increasing disability for seven years after his diagnosis. He likens MS to terrorist activity.
This makes perfect sense to me - each relapse a terrorist attack, each course of steroids the emergency services attempting to mop up the disaster scene and the disease modifying drugs the equivalent to the intelligence services reducing the terrorist activity.
Here's Johnny makes it's network premiere in the UK on Tuesday 17 February on More 4 at 10pm. Johnny has a more progressive form of MS than I currently have, so even though I am greatly looking forward to seeing it, I will be viewing with some trepidation for what might be.
Some relevant links:
Here's Johnny website
Interview in the Daily Telegraph